氢氦离子辐照制备异质结构时NiO/SiO2界面化学亲和还原氧的机理

IF 8 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Nanoscale Horizons Pub Date : 2025-01-02 DOI:10.1039/d4nh00460d

Mario Mery, Claudio Gonzalez-Fuentes, Igor Stanković, Jorge M Nuñez, Jorge E Valdés, Myriam H Aguirre, Carlos García

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引用次数: 0

摘要

由于低能光离子束能够改变超材料的结构和性能，因此在纳米磁性材料和界面的光刻中是必不可少的资源。在这里，我们创建了具有控制层厚度和纳米级精度的铁磁/非铁磁异质结构。为此，采用氢离子（H+）辐照将反铁磁性的氧化镍（NiO）层还原为铁磁性的Ni，其影响比氦离子（He+）辐照更低。我们的研究结果表明，H+与氧的化学亲和力是有效原子去除的主要机制，而不是He+辐照，在那里对氧的化学亲和力可以忽略不计。

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Mechanism of oxygen reduction via chemical affinity in NiO/SiO₂ interfaces irradiated with keV energy hydrogen and helium ions for heterostructure fabrication.

Low-energy light ion beams are an essential resource in lithography for nanopatterning magnetic materials and interfaces due to their ability to modify the structure and properties of metamaterials. Here we create ferromagnetic/non-ferromagnetic heterostructures with a controlled layer thickness and nanometer-scale precision. For this, hydrogen ion (H⁺) irradiation is used to reduce the antiferromagnetic nickel oxide (NiO) layer into ferromagnetic Ni with lower fluence than in the case of helium ion (He⁺) irradiation. Our results indicate that H⁺ chemical affinity with oxygen is the primary mechanism for efficient atom remotion, as opposed to He⁺ irradiation, where the chemical affinity for oxygen is negligible.

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来源期刊

Nanoscale Horizons Materials Science-General Materials Science

CiteScore

16.30

自引率

1.00%

发文量

141

期刊介绍： Nanoscale Horizons stands out as a premier journal for publishing exceptionally high-quality and innovative nanoscience and nanotechnology. The emphasis lies on original research that introduces a new concept or a novel perspective (a conceptual advance), prioritizing this over reporting technological improvements. Nevertheless, outstanding articles showcasing truly groundbreaking developments, including record-breaking performance, may also find a place in the journal. Published work must be of substantial general interest to our broad and diverse readership across the nanoscience and nanotechnology community.